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FTOS Configuration Guide for the C-Series - Force10 Networks

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Important Points to Remember<br />

• RSTP is disabled by default.<br />

• <strong>FTOS</strong> supports only one Rapid Spanning Tree (RST) instance.<br />

• All interfaces in VLANs and all enabled interfaces in Layer 2 mode are automatically added to <strong>the</strong><br />

RST topology.<br />

Configure Interfaces <strong>for</strong> Layer 2 Mode<br />

All interfaces on all bridges that will participate in Rapid Spanning Tree must be in Layer 2 and enabled.<br />

R1(conf)# int range gi 1/1 - 4<br />

R1(conf-if-gi-1/1-4)# switchport<br />

R1(conf-if-gi-1/1-4)# no shutdown<br />

R1(conf-if-gi-1/1-4)#show config<br />

!<br />

interface GigabitE<strong>the</strong>rnet 1/1<br />

no ip address<br />

switchport<br />

no shutdown<br />

!<br />

interface GigabitE<strong>the</strong>rnet 1/2<br />

no ip address<br />

switchport<br />

no shutdown<br />

!<br />

interface GigabitE<strong>the</strong>rnet 1/3<br />

no ip address<br />

switchport<br />

no shutdown<br />

!<br />

interface GigabitE<strong>the</strong>rnet 1/4<br />

no ip address<br />

switchport<br />

no shutdown<br />

Figure 292 Configuring Interfaces <strong>for</strong> Layer 2 Mode<br />

To configure <strong>the</strong> interfaces <strong>for</strong> Layer 2 and <strong>the</strong>n enable <strong>the</strong>m:<br />

Step Task Command Syntax Command Mode<br />

1 If <strong>the</strong> interface has been assigned an IP<br />

address, remove it.<br />

R1 R2<br />

1/1 1/2<br />

3/1 3/2<br />

no ip address INTERFACE<br />

2 Place <strong>the</strong> interface in Layer 2 mode. switchport INTERFACE<br />

3 Enable <strong>the</strong> interface. no shutdown INTERFACE<br />

Verify that an interface is in Layer 2 mode and enabled using <strong>the</strong> show config command from<br />

INTERFACE mode.<br />

410 Rapid Spanning Tree Protocol<br />

R3<br />

1/3<br />

1/4<br />

3/3<br />

3/4<br />

2/1<br />

2/2 2/3 2/4

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